/*
 * Copyright 2013-2018 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.jiawa.springcache.redis.web;

import org.springframework.cache.annotation.CacheEvict;
import org.springframework.cache.annotation.CachePut;
import org.springframework.cache.annotation.Cacheable;
import org.springframework.data.domain.Page;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;

import java.util.HashMap;
import java.util.Map;

/**
 * @author <a href="mailto:chenxilzx1@gmail.com">theonefx</a>
 */
@Controller
public class BasicController {

    // http://127.0.0.1:8080/hello?name=lisi
    @RequestMapping("/hello")
    @ResponseBody
    @CachePut(cacheNames = "CACHE_ACCESS_TOKEN",key = "#name")
    public String hello(@RequestParam(name = "name", defaultValue = "unknown user") String name) {
        return "Hello " + name;
    }

    // http://127.0.0.1:8080/user
    @RequestMapping("/user")
    @ResponseBody
    public User user() {
        User user = new User();
        user.setName("theonefx");
        user.setAge(666);
        return user;
    }

    // http://127.0.0.1:8080/save_user?name=newName&age=11
    @RequestMapping("/save_user")
    @ResponseBody
    public String saveUser(User u) {
        return "user will save: name=" + u.getName() + ", age=" + u.getAge();
    }

    // http://127.0.0.1:8080/html
    @RequestMapping("/html")
    public String html() {
        return "index.html";
    }

    @ModelAttribute
    public void parseUser(@RequestParam(name = "name", defaultValue = "unknown user") String name
            , @RequestParam(name = "age", defaultValue = "12") Integer age, User user) {
        user.setName("zhangsan");
        user.setAge(18);
    }

//    beforeInvocation = true：这是一个重要的参数，它指定了缓存清除操作发生的时间点。
//    当 beforeInvocation 设置为 true 时，意味着缓存的清除操作将在被注解的方法实际执行之前发生。这意味着，不论被注解的方法执行是否成功，也不管方法内部是否有异常抛出，缓存清除动作都会执行。这对于需要确保无论业务逻辑结果如何都要清理缓存的场景非常有用，比如在更新数据前需要先清空旧的缓存数据以避免脏读。
//    相反，如果 beforeInvocation 未指定或设为 false（默认值），那么缓存清除操作将在方法成功执行完毕之后执行。这意味着，只有当方法没有抛出任何未被捕获的异常并且正常结束时，缓存才会被清除。这种方式适用于大多数常规场景，即仅当业务逻辑处理成功后才清理相关的缓存数据。
    @CacheEvict(value = "userCache", key = "#name", beforeInvocation = true)
    public boolean delete(Integer id) {
        return true;
    }


//    @Cacheable(value = "user:page",key = "#pageNum+'_'+#pageSize")
//    public Map<String, Object> page(Integer pageNum, Integer pageSize) {
//        Map<String,Object> map = new HashMap<>();
//        map.put("totalRecord",listPage.getTotal());
//        map.put("totalPage",listPage.getPages());
//        map.put("list",listPage.getRecords());
//        return map;
//    }

}
